{"id":"CVE-2026-31842","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-31842","generatedAt":"2026-10-28T00:25:34.841Z","title":"Tinyproxy through 1.11.3 is vulnerable to HTTP request parsing desynchronization due to a case-sensitive comparison of the Transfer-Encoding header in src/reqs.c.","description":"Tinyproxy through 1.11.3 is vulnerable to HTTP request parsing desynchronization due to a case-sensitive comparison of the Transfer-Encoding header in src/reqs.c. The is_chunked_transfer function uses strcmp to compare the header value against \"chunked\", even though RFC 7230 specifies that transfer-coding names are case-insensitive.","published":"2026-04-07T12:16:21.000Z","lastModified":"2026-08-10T12:17:15.000Z","status":"Modified","sourceIdentifier":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","cvss":{"version":"4.0","score":8.7,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-444"],"affected":["tinyproxy project/tinyproxy"],"epss":{"score":0.00574,"percentile":0.47158,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.57%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://datatracker.ietf.org/doc/html/rfc7230","tags":["Exploit","Technical Description"],"source":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c"},{"url":"https://github.com/tinyproxy/tinyproxy","tags":["Product"],"source":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c"},{"url":"https://github.com/tinyproxy/tinyproxy/issues/604","tags":["Exploit","Issue Tracking"],"source":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31842","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}